package com.tegtech.starter.security.filter;

import java.io.IOException;
import java.util.Arrays;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.web.authentication.WebAuthenticationDetailsSource;
import org.springframework.stereotype.Component;
import org.springframework.web.filter.OncePerRequestFilter;

import com.tegtech.common.utils.http.RequestUriMatcher;
import com.tegtech.module.auth.domain.LoginUser;
import com.tegtech.starter.security.SecurityUtils;
import com.tegtech.starter.security.service.TokenService;

import cn.hutool.core.lang.Validator;

/**
 * token过滤器 验证token有效性
 * 
 * @author Jun
 */
@Component
public class JwtAuthenticationTokenFilter extends OncePerRequestFilter {
	
	@Autowired
	private TokenService tokenService;
	
	// 允许匿名访问的uri，多个用逗号隔开
	@Value("${token.excludeUris}")
	private String excludeUris;

	@Override
	protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain chain)
			throws ServletException, IOException {
		
		// 过滤无需进行token校验的请求
		if(RequestUriMatcher.antMatchs(Arrays.asList(excludeUris.split(",")), request.getRequestURI())) {
			chain.doFilter(request, response);
			return;
		}
		
		LoginUser loginUser = tokenService.getLoginUser(request);
		if (Validator.isNotNull(loginUser) && Validator.isNull(SecurityUtils.getAuthentication())) {
			tokenService.verifyToken(loginUser);
			UsernamePasswordAuthenticationToken authenticationToken = new UsernamePasswordAuthenticationToken(loginUser, null, loginUser.getAuthorities());
			authenticationToken.setDetails(new WebAuthenticationDetailsSource().buildDetails(request));
			SecurityContextHolder.getContext().setAuthentication(authenticationToken);
		}
		chain.doFilter(request, response);
	}
}
